Big Soda Spring

Lake County, California · Near Soda Bay
39.0060°N, 122.7870°W · 1,321 ft
90°F 62°F air · Good soaking weather 1,321 ft Roadside Camping nearby (20.9 mi)

Big Soda Spring sits at Soda Bay in Lake County, warm water half a mile from the community and a short distance off Willow Road. The water comes in right at the bottom of soaking-warm, ninety degrees, pleasant on a cool day. The Wikipedia article that the record links to describes Big Caliente Hot Springs in the Los Padres National Forest, a different spring entirely. Ownership and access are blank.

Location

Willow Road passes within a couple hundred feet. Elevation is low, around thirteen hundred feet, and the climate is mild and fairly wet, twenty-six inches of rain and very little snow. Letts Lake Campground, twenty-one miles out, is a long way for the nearest campground. Nothing in the record describes the land owner or unit.

The rating points at winter, and snow will seldom be in the way. Letts Lake is a drive, as noted. Access has not been recorded, so the half mile from Soda Bay may cross private ground; confirm first. Sitting in water this warm carries no burn risk.

Terrain

Aircraft with laser scanners measured this ground to within inches. The scan strips out trees and buildings, leaving the bare shape of the land around Big Soda Spring.

Aerial view of the ground around Big Soda Spring LiDAR bare-earth view of the same ground around Big Soda Spring
Aerial LiDAR bare earth

Drag the handle to compare the two views. The orange dot marks the spring, in a frame about three quarters of a mile wide.

Setting
Hillside
The spring sits on a steep slope that climbs to the southeast.
Highest ground nearby
322 ft above the spring
Within a quarter mile, to the southeast
Cross-section through the spring

A slice through the ground from northwest to southeast, about 0.6 miles end to end.

Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.

Heat Below
145 milliwatts per square meter of heat flow

That's about twice the US average of 65. It's higher than at 92% of the springs on this site.

Heat flow measures the warmth working its way up through the ground from deep inside the earth. Where it runs high, rain and snowmelt that seep down through cracks in the rock come back up hot.

Heat flow estimate: Stanford Thermal Earth Model (Aljubran & Horne, 2024), CC BY 4.0.

Monthly Climate
47°
Jan
49°
Feb
51°
Mar
56°
Apr
63°
May
72°
Jun
78°
Jul
77°
Aug
72°
Sep
64°
Oct
53°
Nov
47°
Dec
Annual Precip: 25.9 in Annual Snow: 4.8 in
Best Time to Visit
December Air 47°F · Water 90°F · +44° contrast
January Air 47°F · Water 90°F · +43° contrast
February Air 49°F · Water 90°F · +41° contrast
December offers 32°F more contrast than July
Current Conditions
62°F
WSW 10.8 mph 51% Good soaking weather
Tuesday 86° Low 57° Sunny
Spring is +4° warmer
Wednesday 79° Low 55° Sunny 4% precip
Spring is +11° warmer
Thursday 81° Low 54° Sunny 1% precip
Spring is +9° warmer
Friday 88° Low 57° Sunny
Spring is +2° warmer
Saturday 88° Low 59° Sunny
Spring is +2° warmer
Where to Stay

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Nearby Camping
Letts Lake Campground 20.9 mi away

The main feature of the area is a 35-acre lake for non-motorized vessels, trout fishing and swimming. A one-mile trail leads along the lake shore. There are accessible restrooms and a popular fully-accessible fishing pier.

Reserve on Recreation.gov →
Temperature
90°F
Warm Hot Boiling
Water Temp 90°F (32°C)
Avg Air Temp 61°F
Above Ambient +29°F
Warm air, warm water September
Access
Road Access Roadside
Nearest Road Willow Road
Distance to Road 241 ft
Frequently Asked Questions
What is the water temperature at Big Soda Spring?
Big Soda Spring has a water temperature of 90°F (32°C). This is a warm thermal spring.
Where is Big Soda Spring located?
Big Soda Spring is located in Lake County, California at 1,321 feet elevation, near Soda Bay. Coordinates: 39.0060°N, 122.7870°W.
How do I get to Big Soda Spring?
Big Soda Spring has Roadside road access, with the nearest road being Willow Road (241 ft from the road).
Can I camp near Big Soda Spring?
Yes, Letts Lake Campground is located nearby (20.9 miles away).
Sources: Wikipedia